Question

Class A
{
   string name;
   IList<A> minorList = new List<A>();
}

IList<A> majorList = new List<A>();

I Want to get the instance of A from majorList depending upon the name value, but it is not necessary to have it in the majorList. minorList can also contain the name. How can I get it using Linq. If it is there in only majorList I can get it by using

A a = majorList.First(s => s.Name == "Name");

How about if it is not in the majorList but in some of the List of instance of majorList?

Answer 1

Sounds like you want something like:

bool ContainsName(A a, string name)
{
    return a.name == name || a.minorList.Any(x => ContainsName(x, name));
}

Then:

A a = majorList.First(x => ContainsName(x, name));

Of course you end up with a problem if there are any cycles in your lists…